ci: better renovate config for grouping dependencies (#40)

renovate.json

@@ -1,6 +1,35 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:recommended"
-  ]
+  "extends": ["config:base", "docker:pinDigests"],
+  "minimumReleaseAge": "5 days",
+  "packageRules": [
+    {
+      "groupName": "core",
+      "matchUpdateTypes": ["minor", "patch"],
+      "excludePackageNames": ["node", "@types/node"],
+      "schedule": "on tuesday"
+    },
+    {
+      "matchFileNames": [".github/**"],
+      "groupName": "github-actions",
+      "schedule": "on tuesday"
+    },
+    {
+      "matchDatasources": ["npm"],
+      "rangeStrategy": "bump",
+      "groupName": "node",
+      "versioning": "node",
+      "matchPackageNames": ["node", "@types/node"],
+      "schedule": "on tuesday"
+    },
+    {
+      "groupName": "node",
+      "matchDatasources": ["docker"],
+      "matchPackageNames": ["node"],
+      "versionCompatibility": "^(?<version>[^-]+)(?<compatibility>-.*)?$",
+      "versioning": "node",
+      "schedule": "on tuesday"
+    }
+  ],
+  "labels": ["dependencies", "renovate"]
 }